Grinding-machine.



No. 893,158. I PATENTED JULY 14, 1908. O. G. GARRIGUS & H. W. SPELLMAN.

GRINDING MACHINE.

APPLICATION FILED 0012s. 1907.

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No. 893,158. PATENTED JULY 14, 1908. G. G. GARRIGUS & H. W. SPELLMAN. GRINDING MACHINE.

APPLICATION FILED 0013 1907.

3 SHEETS-SHEET 2.

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. PATENTED JULY 14, 1908. 0. G.'GARRIGUS & H. W. SPELLMAN. GRINDING MACHINE.

APPLICATION FILED 00T.3.1907- 3 SHEETS-SHEET 3.

[UNIT D STATES PATENT OFFICE.

CLARENCE G. GARRIGUS AND HERBERTW. SPELLMAN, OF NEW'BRITAIN,

CONNECTICUT,

ASSIGNORS TO LANDERS, FRARY AND CLARK, OF NEW BRITAIN, CONNECTICUT, A COR- PORATION OF CONNECTICUT.

GRIN DING-MACHINE.

Specification of .Le'tters Patent. Patented July 14, 1908.

Application filed October 3-, 1907. Serial No. 395,727.

To all whormit may concern.

Be it known that we, CLARENCE G. GARRI- GUS and HERBERT W. SPELLMAN, both citizens of the United States, residing at New Britain, in the county ofHartford and State of Connecticut, have invented certain new and useful Im rovements in Grinding-Machines, of which the following is a specification.

Our invention relates to improvements in grinding machines and the objects of our improvements are simplicity and economy in construction, and convenience and efficiencg in use. This is particularly the case wit reference to the control of the carriage and the longitudinal adjustment of the grindingspindle.

In the accompanying drawing: Figure 1 is aplan view of our machine. Fig. 2 is an elevation of the same, showing an end view of the machine, (the bottom end of Fig. 1) with a side.view of the carriage. Fig. 3 is a broken out sectional elevation of the same on the line at an of Fig. 1. Fig. 4 is an enlarged broken out sectional elevation of the same on the line y y of Fig. 1. Fig. 5 is' an end view of the carriage and parts immediately connected.

therewith. Fi 6 is an enlarge horizontal section of the t reeewa cock on the line 2 z of 5, which cock be ongs to'the hydraulic en me that operates the carriage. j he machine as shown is especially adapted for grinding table knives.

A designates the frame of the machine, which frame may be supported on any suit- Mounted upon the frame in suitable bearin sis the s mdle or shaft 8 of the hollow rin ing wheel 9. In front of this grinding w eel there is a swin ing carriage bed 10 ,that is pivoted to a brac et 11 of the frame onthe pin'12, Fig. 4. Upon this carriage frame is a reciprocating carriage 13 and a hydraulic engine 14, for operating the same for carrying a knife when attached to the said carriage across the face of therim of the I hollow grinding wheel 9.

- structlon for ad v The tail end of the spindle 8,may be supported inany ordinary form of box'or bearin 15. Theopposite end is sup orted in a tu ular sleeve ,16 that is slidingl eld to the frame by a cap 17 and prevente from rotating therein by an ordinary spline 18, Fig. 3. Iprefer' to taper the spindle and sleeve at the outerend, or end nearest the grinding wheel, as shown in Fig. 3. The spindle is provided with a threaded portion 19,Fig. 3, near the loose pulley 20, and its com anion fast pulley 21. Upon the threade' portion of the spindle isa clamp nut 22, of ordinary construction and having one or more ordinary clamp screws, not shown. By screwing up this nut the tapering ortions of the spindle may be tightened wit in the tubular sleeve d against longitudinal movement.

16 and he therein. That end of the tubular sleeve which is not covered by the cap 17 is exteriorly threaded as at 23 and upon this threaded portion is a nut 24 provided with a rim in i the form of a hand wheel 25. This nut abuts by one end against the end of the cap 17 and a part of the frame in the lane of the said endjof the cap. It is provi ed with a shoulder 26 which is opposed to this abutting end of the nut and (311138 27, Fig. 1, are secured to the frame forengaging this shoulder to hold the nut against longitudinal movement while at the sametime the nut is free to rotate. By rotating the nut the grinding s indle and attached parts may be moved bodi y endwise so as to adjust the grinding wheel toward or from the carriage as may be required.

The carriage 13 is provided with a bed or seat 28 to which any desired holder may be secured in any ordinary manner. It is shown as adaptedfor receiving an ordinary form. of knife holder. Projecting at right angles to the said bed 28 is a short arm 29 and a longer arm 30 which latter may be called the cross arm of the carriage. The carriage wa s are in art formed by a bar 31 that is rigid secured within the arms 29 and 30 and which bar slides throu h proper bearings in the boxes 32 and 33 t at project upwardly from the carriage bed.' The outer end of the cross arm 30 of the carriage is slotted and slides-upon a bar 34 that is rigidly mounted on the carriage bed in a position parallel to the bar 31 upon which the carriage ways are formed.

The'hydraulic engine or cylinder 14 is provided witha piston 35 and piston rod 36,

the said piston rod extending transversely through a hole in the cross arm 30 and for convenience we prefer to form a longitudinal groove 37 in the upper side of the piston rod, whereby a bent rod resting in the said groove and having a projecting tripqping lug 38 at one end, may be adjustably eld on the piston rod bymeans of a collar 39 and set screw 40, as shown in Fig. 4. This lug is for tripping the latch 50 that is pivoted to the open end of the cylinder 14. We also employ adjustable collars 41 and 42 with set screws 43 secured-to the said piston rod on op osite sides of the cross arm 30. To the col ar 41 we secure the chain 44 that runs over a pulley 45 to a weight 46 for moving the carriage in one direction. The other collar 42 has secured to its under side a friction roller 65 for acting u on the end of the angle lever 47. This ang e lever is pivoted to the under side of the cross arm 30 of the carriage as at 48 and carries a friction roller 74 in the outer end of its shorter arm, which roller acts upon afixed bar 49 that is mounted on the frame A. The cylinder head 51 is provided with an ordinary three-way cook 52 having a tapering plug 53 provided with a transverse passage 54 opening on opposite sides and a passage 55 at a right angle thereto, see Fi .6. The socket or body of the cock has t ree ports, of which the ort 56 is the inlet, the port 57 is the cylin er inlet and outlet, and the port 58 is the outlet of the cock. The cock is connected with the cylinder head 51 by t'he' nib 61, the supply ipe 59 is connected with the cock by the supp y nib 60, a suitable discharge pipe 62 is connected with the nib 63. This discharge pipe is provided with a regulating cock 64 which governs the discharge of the water by opening or closing the said cock more or less to increase or diminish the amount of water discharged therefrom. The plug 53 of the cook 52 that controls the flow of the liquid into and out of the cylinder is provided with an operating handle 66. On the top of the cylinder is a sliding bolt 67 having a beveled head for'being engaged by the latch 50. This latch is forced upwardly by a small spiral spring 68, Fig. 4, placed under its horizontal arm. Upon the sliding bolt 67 is an adjustable collar 69 that acts against a lug or upward projection of the cyllnder head 51 to limit the movement of the sliding bolt towards the cook 52. An adjustable collar 70 is rigidly clamped on the body of the sliding bolt and between that collar and the lug 71 in which the said bolt slides there is a spiral spring 72, that acts with a constant tendency to force the said bolt towards the cook 52. The handle 66 of the cook 52 is connected with the collar 70 by means of a rod 73.

When the handle 66 of the cook 52 stands in the position shown in the drawing the passages in the plug put the cylinder in communication with the discharge pipe so that the water runs out through the port 57, passage 55, one end of passage 54 and the port 58, to the discharge pipe 62 and the weight 46 will draw the piston and carriage back into the position shown. Pushing the handle towards the cylinder will force the sliding bolt towards the latch 50 until the beveled head depresses the latch and is engaged thereby as the hook of the latch passes the shoulder of the said head, thereby locking the sliding bolt in place against the force of its spring and also holding the cock in the open tion which it was given by moving the randle. The movement thus given to the plug of the cock closes the outlet port 58 and opens the inlet port 56. The port 57 between the cock and the cylinder is never closed. The water from the supply pipe now rushes into the cylinder through the ports 56 and 57, and drives the piston and piston rod and connected arts outwardly, while the weight 46 is raised. As soon as the collar 41 engages the cross arm 30 of the carriage, the carriage is moved with the piston rod. As the piston and carriage reach the end of their stro (e the tripping lug 38 (see Fig. 4) on the piston rod engages the depending arm of the latch 50 so as to release the said latch from its hold on the beveled head of the sliding bolt 67 upon which the release spring 72 acts to force the said bolt and handle of the cook 52 back into the position shown so that the port 56 is closed and the ports 57 and 58 opened to let the water out of the cylinder for moving the carriage backwardly under the influence of the weight 46. About the time that the "piston rod reaches the outer end of its stroke the fixed friction spring 75 engages a shoe on the collar 76 of the bar 31 so as to tend to holdv the carriage against a return movement. During the outward movement of the carriage the spring 77 that is secured by one end to the frame and by its other end to the swinging carriage has held the carriage slightly away from the grinding wheel so that the said wheel does not act on the work during the forward stroke of the carriage. When the carriage bed 10 is swung on its ivot 12 away from the grinding wheel the onger arm of the lever 47 swings forwardly into engagement with the roller 65 underneath the'collar 42 on the piston rod. When the piston rod starts on its backward movement the friction devices, that is the spring 75 fixed on the carriage bed and the collar and shoe 76 fixed on the carriage, tend to hold the carriage against moving with the sa1d rod so that the roller 65 may act on the angle lever 47 to shift it and press the roller 74 against the fixed bar 49 for swinging the carriage bed 10 towards the grinding wheel to bring the said wheel into action on the return stroke of the carriage. After the lever 47 has been moved sufficiently to thus posiv shift it, the collar 42 en ages the cross arm 30 of the carriage and pu Is the carriage back while the angle lever 47 holds the knife holder of the carriage to its work on the face of the grinding wheel during its return stroke. By throttling thedischarge by means of the cook 64, the return stroke of the carriage can be made as low as may be desired, while opening the said cock more of less will increase the return speed of the carriage. The spring 77 acts to swing the carriage away from the grinding wheel as soon as the piston rod moves forward far enough to release the lever fixed bar on the frame extending 47 to the force of the said spring.

We claim as our invention;

1. In a grinding machine the combination of a frame with a grinding wheel mounted thereon, a reciprocating carriage mounted on the said frame for moving back and forth in front of the said grinding wheel, the said carriage having a cross arm, a hydraulic cylinder and piston with its piston rod connected with the said cross arm, a tripping lug mounted on the said piston rod, a latch mounted on the said cylinder and adapted to be tripped by the said lug, a cock for controlling the flow of liquid into and out of the said cylinder, an o eratingi handle for the said cook, a sliding olt connected with the said handle and adapted for being engaged by the said latch, and a spring acting upon the said sliding bolt for moving it and thesaid operating handle in one direction, whereby the said spring for moving the said operatlng handle in one direction is held under tension by the said slidingbolt and released by means of the piston rod.

2. In a grinding machine, the combination of a reciprocating carria e arm with a hydraulic cy' der, piston and piston rod, for operating the said carria e, the said iston rod extending transverse y to the sai cross arm, and adjustable collars mounted on the said upon either side of t e said cross arm for operating the said carriage.

3.- In a grinding machine, the combination of a frame with a swinging carriage bed pivoted thereon, a spring acting to swing the said carriage bed 1n one direction, a reci roeating carria e mounted on the said swinging carriage ed and having a cross arm, a

longitudinally of the movement of the sai carnage, a hydraulic cylinder, piston and piston rod with the said rod extending transversely to the said cross arm, an angle lever mounted on the said carriage with one end extending transversely to the said piston rod and with its other end in positionfor acting on the said bar, and adjustable collars mounted on having a cross iston rod for acting the said piston I od for acting upon either side of the said cross arm, and also, as to one of the said collars, for acting upon one arm ofv fixed barv on the frame extending longitudinally of the movement of the said carriage, a hydraulic cylinder, piston and piston rod with the said rod extending transversely to the said cross arm, an angle lever mounted on the said carriage with one end extending transversely to the said piston rod and with its other end in position for acting on the. said bar,- adjustable collars mounted on the said piston rod for acting upon either side of the said cross arm and also as to one of the said collars for acting upon one arm of the said angle lever for swinging the carriage bed in opposition to the said spring, and friction devices, one of which is fixed on the swingin bed and the other on the carriage for hol ing the carriage a ainst its return movement until the said ang e lever 1s shifted.

5. Ina grinding machine, the combination of a hydraulic cylinder, piston and iston rod, with a cock for controlling the iquidpassing into and out of the said cylinder, an operatlng handle for'the said cook, a sliding bolt connected therewith, a spring for moving the said bolt and handle inone direction,

' a latch for holding the said bolt with the said s ring under tension, and atripping lug on t e piston rod for acting upon t e said latch to release the said bolt to the action of the said s ring.

6. y n a grinding machine, the combination r of a reciprocating carriage having a cross arm with a hydraulic cylinder, piston and piston rod, a cock for controlling the liquid passing into and out of the said cylinder, an operating handle for the said cook, a sliding bolt connected'therewith, a spring for moving the said bolt and handle in one direction, a latch for holding the said bolt with the sald sprin under tension, a tripping lug and adjusta le collars on the said iston rod, the said lug acting u on the said atch, to release the said bolt to t e action of the said spring and the said collars acting on the said cross arm to move the carriage forward and back.

CLARENCE G. GARRIGUS. HERBERT W. SPELLMAN. Witnesses:

L. G. JUDD, A. J. NORTHROP, Jr. 

